Methods of PaymentIf ordering online, payment by credit card is the only accepted method of payment (MC, Visa, Amex, Discover).

If ordering by phone direct from the factory, payment by credit card is accepted (MC, Visa, Amex, Discover), however parts must be shipped to the address that the credit card is billed to. To arrange shipping to another address you must contact your credit card company to add an auxiliary address.

Important: Your bank will charge a $50 Bank Wire Fee. Include this with your total payment.

Company checks are acceptable only if you have established credit with Crower prior to your order. Open accounts may be arranged by emailing Crower Customer Service.

Personal and non-certified check are accepted, however you must allow 2-3 weeks for check to clear before parts are sghipped or production begins. Credit applications are available upon request. A minimum of 50% deposit is required on all custom parts.

C.O.D. Policy All shipments will be made C.O.D. only (cashiers check or money order as of 1/99...NO CASH), unless prepayment is received with the order or prior arrangements have been made for open account. Prepayments must be made by cashier's check or money order only. Company checks will be accepted only with established credit. Personal checks are acceptable, but must wait for check to clear before proceeding with order. Allow 2 to 3 weeks for personal checks to clear.

Use of Synthetic Oils Crower does not recommend the use of synthetic motor oil in any application, particularly in hydraulic and flat tappet camshafts. If your car manufacturer's owners manual suggests running synthetic oil, you may do so. The minimum gains in horsepower are offset by the excessive wear to cam and lifter surfaces. We have found that the benefits, of synthetic motor oil, do not outweigh the costs and may endanger your engine's life. Crower recommends a non-detergent / race only petroleum based 30wt. motor oil in all performance applications. The lack of phosphorus and zinc in current oil blends is catastrophic to engine longevity. For all applications we do recommend running our ZDDPlus additive, which adds zinc and phosphorus back into the oil. For additional information on oil, click here!

How do I measure a cam's base circle size? Look at a cam lobe as if you were looking at an egg. Put the pointy end (the nose of the lobe) up, pointing to the sky, and therefore the fatter part towards the ground. Once you have done this, you want to measure the width of the cam lobe. With the nose pointing up you will measure the lobe horizontally. These 2 pictures should illustrate how to measure the cam's base circle size, correctly.